Chorizanthe robusta |
Chorizanthe obovata |
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robust spineflower, Scotts Valley spineflower |
spoon-sepal spineflower |
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Habit | Plants erect to spreading or decumbent, 0.5–3 × 0.1–6 dm, villous. | Plants erect to prostrate, (0.5–)1–3(–4) × 1–4(–5) dm, pubescent. | ||||
Leaves | basal or nearly so; petiole 1–4(–7) cm; blade oblanceolate, 1.5–5 × 0.2–0.7(–1) cm, villous. |
basal; petiole 0.5–2(–3) cm; blade oblanceolate, 0.5–2.5 × 0.3–1 cm, thinly pubescent adaxially, soft-hirsute abaxially. |
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Inflorescences | with secondary branches not suppressed except in terminal clusters of involucres, green to reddish; bracts 2, similar to proximal leaf blades only reduced, short-petiolate, becoming linear and aciculate at distal nodes, acerose, 1–5 cm × 2–5(–7) mm, awns absent. |
with involucres in open clusters 2–4(–6) cm diam., greenish or reddish; bracts 2–3 at proximal node, usually leaflike, without whorl of sessile bracts about midstem, elliptic, 0.5–1.5 cm × 2–6(–8) mm, abruptly reduced above proximal node, becoming scalelike, linear, aciculate, acerose, 0.2–1 cm × 1–3 mm, awns straight, 1–2 mm. |
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Involucres | 1, greenish, cylindric, not ventricose, 2.5–4 mm, with white to pinkish, thin scarious margins restricted to basal portion of teeth, not corrugate, thinly pubescent abaxially; teeth spreading, equal, 0.3–0.8(–1) mm; awns uncinate with longer ones 0.7–1.3 mm and anterior one mostly 1–1.3 mm, these alternating with shorter (0.3–0.7 mm) ones. |
3–10+, grayish, urceolate, slightly ventricose basally, 3–4 mm, slightly corrugate, without scarious or membranous margins, thinly to densely pubescent; teeth erect to spreading, unequal, 1–2 mm; awns straight or uncinate with longer anterior one straight, mostly 1 mm, others uncinate, 0.5–1 mm. |
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Flowers | slightly exserted; perianth bicolored with floral tube white and tepals white to rose, cylindric, 2.5–4 mm, pubescent abaxially; tepals connate 1/4 their length, monomorphic, oblanceolate to narrowly oblong, usually truncate to rounded and erose or denticulate apically, occasionally distinctly cuspidate; stamens 9, included; filaments distinct, 2–3.5 mm, glabrous; anthers pink to red or maroon, oblong, 0.6–0.8 mm. |
exserted; perianth bicolored with floral tube greenish white to white and tepals white to pink, cylindric, 4–4.5(–5) mm, sparsely pubescent; tepals connate 1/2 their length, dimorphic, obovate, those of outer whorl spreading, 2 times longer than those of inner whorl, rounded or slightly obcordate apically, those of inner whorl erect, narrower, fimbriate apically; stamens (6–)9, mostly included; filaments distinct, 4–4.5 mm, glabrous; anthers yellow to golden, oblong, 0.9–1.1 mm. |
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Achenes | light brown, globose-lenticular, 3.5–4 mm. |
brown, globose-lenticular, 3–3.5 mm. |
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2n | = 38, 40, 42. |
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Chorizanthe robusta |
Chorizanthe obovata |
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Phenology | Flowering May–Jul. | |||||
Habitat | Sandy or calcareous soils, mixed grassland, coastal scrub, or chaparral communities, pine-oak woodlands | |||||
Elevation | 10-1300 m (0-4300 ft) | |||||
Distribution |
wc Calif
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CA
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Chorizanthe obovata is found in the Coast Ranges. The whitish flowers quickly distinguish it from C. palmeri and the other reddish-flowered members of this complex. Immature plants can be confused with C. staticoides; the floral features readily separate the two species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 5, p. 455. | FNA vol. 5, p. 459. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Parry: Proc. Davenport Acad. Nat. Sci. 5: 176. (1889) | Goodman: Ann. Missouri Bot. Gard. 21: 70. (1934) | ||||
Web links |